package com.wbao.dianniu.utils;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Paint;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;

public class GlideCircleTransform extends BitmapTransformation {

	public GlideCircleTransform(Context context) {
		super(context);
	}

	@Override
	protected Bitmap transform(BitmapPool pool, Bitmap toTransform,
			int outWidth, int outHeight) {
		return circleCrop(pool, toTransform);
	}

	private Bitmap circleCrop(BitmapPool pool, Bitmap toTransform) {
		if (toTransform == null)
			return null;
		int size = Math.min(toTransform.getWidth(), toTransform.getHeight());
		int x = (toTransform.getWidth() - size) / 2;
		int y = (toTransform.getHeight() - size) / 2;

		// TODO this could be acquired from the pool too
		Bitmap squared = Bitmap.createBitmap(toTransform, x, y, size, size);

		Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);
		if (result == null) {
			result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
		}

		Canvas canvas = new Canvas(result);
		Paint paint = new Paint();
		paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP,
				BitmapShader.TileMode.CLAMP));
		paint.setAntiAlias(true);
		float r = size / 2f;
		canvas.drawCircle(r, r, r, paint);
		return result;
	}

	@Override
	public String getId() {
		return getClass().getName();
	}

}
